JPH07243139A - Slit yarn for prevention of forgery - Google Patents

Abstract

PURPOSE:To obtain slit yarn having a multilayer structure, capable of being blended in paper for securities and other important documents during the course of paper making and making it possible to prevent forgery by color copy, etc. CONSTITUTION:A deposited metal layer 3 composed of gold, aluminum, etc., ad having an arbitrary pattern shape is formed through an epoxy resin-based undercoating film layer 2 on one or both the sides of a base film 1 of polyethylene terephthalate, etc., and a cellulosic resin-based intermediate resin coating film layer 4 is further put thereon. A micro-printing layer 5 on which, e.g. logo marks or names of association are printed with multicolors is subsequently put thereon and a melanin-alkyd resin-based overcoating film layer 6 is then put thereon in layers. The resultant laminate is slit into a narrow size by a micro-slitter and the obtained slit yarns are blended in security paper, etc. If the obtained security paper is copied by a color copying machine, the glossy deposited metal parts of the slit yarns are copied black. It is possible, therefore, to distinguish a copied material from the real at a glance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forgery preventing slit thread using a metal vapor deposition film. More specifically, the slit thread for forgery prevention of the present invention is a gift certificate, a bill, a securities,
Paper such as passports, tickets, cards, important documents, etc. that have been cut long or have been cut to an appropriate length can be put into paper such as Japanese paper, Western paper, synthetic paper, or can be cut into two pieces of paper. For example, it is difficult to forge by inserting it between them, and it is used to prevent duplication by copying,
Since it can be easily identified by an optical or wavelength sensor by utilizing the light reflectivity of metal, it can be used in crime prevention devices, or by simply weaving it into a desired place such as a woven fabric, it is possible to put a woven name etc. It is easy to distinguish from and can be used to eliminate counterfeit goods.

[0002]

2. Description of the Related Art Conventionally, in order to prevent counterfeiting of banknotes, securities, gift certificates, etc., complicated and delicate multicolor printing, paper with a watermark pattern, special printing ink (for example, Magnetic ink, fluorescent ink, etc.) are also known.

[0003]

However, each of the conventional methods used for preventing forgery has its own problems. For example, when performing complex and delicate multi-color printing, it is necessary to create multiple complex and delicate printing plates, so the printing plate cost is extremely high, and printing is also specially performed for overprinting with multiple printing plates. Skilled technicians are required,
The yield is not good, and moreover, no matter how complicated and delicate multi-color printing is performed, the performance of copiers these days makes it easy to make copies that are indistinguishable from originals. There was a problem that it was not possible to completely prevent counterfeiting. Also, when using paper with a watermark pattern, it can be made relatively easily because the watermark pattern is inserted at the stage of papermaking, but it is confirmed that it is not a bright place to check the presence or absence of the watermark pattern. There is a problem in that it is not possible to do this because it is not realistic to check by watermarking each sheet, which is often overlooked. Also, when using a special printing ink (eg magnetic ink, fluorescent ink, etc.), it cannot be confirmed without a special magnetic sensor or ultraviolet irradiation device. Use a magnetic sensor or ultraviolet irradiation device for each sheet. There is a problem that it is not realistic to confirm it, and it is not confirmed individually.

Therefore, it is an object of the present invention to perform complicated and delicate multicolor printing, use paper provided with a watermark pattern, and special paper to prevent counterfeiting of conventional banknotes, securities, gift certificates, etc. The present invention provides a novel forgery-preventing slit thread that can solve all the problems that are caused by using various printing inks and solves the above-mentioned problems.

[0005]

The slit thread for forgery prevention of the present invention comprises a base film (1) formed on at least one side of a metal vapor deposition layer (3) and a microprinting layer (5) in this order. A thread slit into a narrow width, or a thread in which a microprinting layer (5) and a metal deposition layer (3) are formed in this order on at least one surface of the base film (1) is used as a thread slit into a narrow width. As a result, it is possible to easily identify the image directly with the naked eye.

[0006]

The structure of the forgery preventing slit yarn of the present invention will be described in detail with reference to the drawings. 1 to 5 are schematic diagrams relating to the forgery preventing slit yarn of the present invention.
Is a metal deposition layer (3) on the entire front surface of the base film (1).
And then forming a minimal printing layer (5) with a transparent ink, and etching the metal deposition layer (3) using the minimal printing layer (5) as a resist film to obtain a minimal printing having metallic luster It is a schematic plan view which shows a part of film-like thing in which the layer (5) was formed, and a dashed-dotted line in a figure shows the slit part (A) when it slits later and it is set as a forgery prevention slit thread. Since the metal vapor deposition layer (3) has the same pattern as the minimum printed layer (5) and is under the minimum printed layer (5) and cannot be seen from the front side, it is omitted in FIG. Figure 2
FIG. 2 is an enlarged schematic plan view of a part of the forgery prevention slit yarn obtained by slitting the film-like material of FIG. 1 at the slit portion (A). In FIG. 3, an undercoat resin layer (2), a metal vapor deposition layer (3), an intermediate coat resin layer (4), a micro print layer (5), and an overcoat resin layer (6) were sequentially formed on the entire front surface of the base film (1). It is the schematic sectional drawing which expanded a part of forgery prevention slit thread. FIG. 4 shows an example of a forgery-preventing slit yarn in which a metal vapor deposition layer (3) having an arbitrary pattern and a microprinting layer (5) synchronized with the pattern of the metal vapor deposition layer (3) are sequentially formed on the front side of the base film (1). It is the schematic sectional drawing which expanded the part. FIG. 5 shows a micro print layer (5) on the front side of the base film (1),
It is the schematic sectional drawing which expanded a part of forgery prevention slit thread which formed the metal vapor deposition layer (3) of arbitrary patterns, and the whole surface top coating resin layer (6) one by one. It should be noted that the present invention does not limit the scope of these drawings, and for example, the undercoat resin layer (2), the metal vapor deposition layer (3), the intermediate coating resin layer (4), and the minimal printing on both sides of the base film (1). Modifications such as forming the layer (5) and the overcoat resin layer (6) and laminating the film via the adhesive layer instead of the overcoat resin layer (6) are also included.

The base film (1) used for the forgery prevention slit yarn of the present invention is not particularly limited, and may be transparent or opaque, and any one commonly used for metal vapor deposition or printing may be used. be able to. As such a base film (1), for example, a polycarbonate film, an acrylic film, a cellulose triacetate film, a polyarylate film, a polystyrene film, a polyethylene naphthalate film, a polyethylene terephthalate film, a polyimide film, a polyamide film and the like are preferable, and any of them is preferable. Surface treatment such as easy adhesion, easy slippage, antistatic, corona, and saponification may be applied. There is no particular limitation on the thickness, and a range of 4 to 300 μm is usually preferable. If the thickness is less than 4 μm, the strength is insufficient, and wrinkles are generated in the steps such as metal vapor deposition processing and printing processing, vapor deposition burning occurs, and the workability is poor, which is not preferable. On the other hand, when the thickness exceeds 300 μm, the strength is too strong and the winding property in the roll-up type vacuum vapor deposition is poor, and the loading amount (length) per time is small, which increases the vacuum vapor deposition cost and the material cost. It is not economical from the point of view either, and it is not practical or preferable except in special cases.

The undercoat resin layer (2) suitably used for the forgery preventing slit yarn of the present invention is not particularly limited, and examples thereof include thermoplastic resin, thermosetting resin, electron beam curable resin, ultraviolet curable resin and the like. A coating consisting of any of the above is also used. For example, amino resin, amino alkyd resin, acrylic resin, styrene resin, acrylic-styrene copolymer, polyester resin, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral , Urethane resin, urea resin, melamine resin, urea-melamine resin, epoxy resin,
Fluorine resin, polycarbonate, nitrocellulose,
A resin coating composed of cellulose acetate, an alkyd resin, a rosin-modified maleic acid resin, a polyamide resin, or the like alone or as a mixture thereof is used as the resin coating for the undercoat resin layer (2).

The undercoat resin layer (2) is coated with the resin paint for the undercoat resin layer (2) on one surface of the base film (1) by a conventional coating method such as a gravure coating method, a roll coating method, or a spray coating method. It is formed by coating and drying (curing in the case of a curable resin). The thickness of the undercoat resin layer (2) is not particularly limited and is usually appropriately selected from the range of about 0.01 to 5 μm. When the thickness is less than 0.01 μm, it is difficult to uniformly coat the surface of the base film (1), and the effect of forming the undercoat resin layer (2) such as suitability for vapor deposition processing, suitability for printing processing, and improvement in gloss imparting is reduced. It cannot be exhibited sufficiently and it is not worth forming the undercoat resin layer (2). On the other hand, even if it exceeds 5 μm, there is a large difference in the effect of the undercoat resin layer (2) such as vapor deposition processability, printing processability and improvement of gloss imparting. However, the drying rate of the undercoat resin layer (2) is slow and inefficient, which is not preferable.
When it is desired to give diffused reflectivity to the metal vapor deposition layer (3) formed next to the undercoat resin layer (2), the resin coating for the undercoat resin layer (2) should have a matting agent such as precipitated barium sulfate or carbonate. Pre-mixed with barium, powder (CaCO ₃ ), gypsum, white alumina, clay, white silica, talc, calcium silicate, precipitating magnesium carbonate and other extender pigments, and aluminum powder, brass powder, copper powder and other metal powders. A dispersed material can be used.

The method for forming the metal vapor deposition layer (3) used for the forgery prevention slit yarn of the present invention is not particularly limited,
For example, it is formed by a normal metal thin film such as a vacuum deposition method, a sputtering method, an ion plating method, a reactive vacuum deposition method, a reactive sputtering method, a reactive ion plating method, a metal compound thin film or an alloy thin film forming method. . Therefore, the vapor deposition method referred to in the specification of the present invention includes the above-mentioned vacuum vapor deposition method, sputtering method, ion plating method, reactive vacuum vapor deposition method, reactive sputtering method, and reactive ion plating method.
The metal used for the metal vapor deposition layer (3) of the present invention is not particularly limited, and for example, simple metals such as silver, aluminum, platinum, titanium, chromium, nickel, tin, iron, cobalt, and zinc sulfide, bismuth oxide, etc. And a metal compound such as a nickel-chromium alloy, stainless steel, Inconel, or a silver-gold-copper alloy can be used. Therefore, the metal vapor deposition layer (3) referred to in the specification of the present invention includes the above-mentioned single metal vapor deposition layer, metal compound vapor deposition layer, and alloy vapor deposition layer. The thickness of the metal vapor deposition layer (3) is not particularly limited, but is usually appropriately selected from the range of about 20 nm to 200 nm. When the thickness is less than 20 nm, the reflectance is poor, while when it exceeds 200 nm, the reflectance is not further improved.
The internal stress of the metal vapor deposition layer (3) increases and the adhesion strength with the base film (1) or the undercoat resin layer (2) tends to decrease, and the amount of heat received by the base film (1) during metal vapor deposition processing increases. Since the base film (1) is thermally damaged by that amount, expansion and contraction and wrinkles are caused to reduce workability, and the amount of metal used is increased.

There is no particular limitation on the method for forming the discontinuous pattern of the metal vapor deposition layer (3) used in the forgery prevention slit yarn of the present invention. For example, a pattern is vapor-deposited using a mask during the formation of the metal thin film. Starting with the mask vapor deposition method which is simultaneously formed, an opal processing method (a kind of etching method) of removing an unnecessary metal vapor deposition layer (3) portion after forming a metal vapor deposition layer (3) on the entire surface in advance, and a celite processing method (cleaning) Method), a lift-off method, a photoresist method, or the like, and an ordinary method for forming a pattern is used, but in the forgery preventing slit yarn of the present invention, the opal processing method and the sealite processing method are preferably used.

Here, the opal processing method and the sealite processing method will be briefly described. In the opal processing method, a base film (1) having a metal vapor deposition layer (3) formed in advance on the entire surface is prepared, and a necessary portion of the metal vapor deposition layer (3) (a metal vapor deposition layer formed in a discontinuous pattern later ( 3) A minimal printed layer (5) with an arbitrary pattern is printed and formed on a portion left as 3) with a corrosion-resistant printing ink, and the metal vapor deposition layer (3) on the exposed portion is removed by etching by immersion in a metal-corrosive solution. Is the way to do it. In addition, in the sea light processing method, an unnecessary portion of the metal vapor deposition layer (3) (a portion which becomes a gap between the metal vapor deposition layers (3) formed in a discontinuous pattern later) is previously formed on the base film (1) with a water-soluble paint. Or, after forming a printed coating film of any pattern with solvent-soluble paint, a metal deposition layer (3) on the entire surface
Is formed and then immersed in water or a solvent to dissolve and remove the metal vapor-deposited layer (3) on the printed coating film having the pattern of the water-soluble coating material or the solvent-soluble coating material. Therefore, a film-like material easily manufactured by a usual printing method, a usual vapor deposition method, and a usual pattern forming method is simply cut into a narrow width by a usual slitter, and no special technique is required.

The intermediate coating resin layer (4), which is appropriately adopted for the forgery preventing slit yarn of the present invention, has the adhesion between the extremely small printing layer (5) and the metal vapor deposition layer (3) and the printing process. Improvement of suitability and formation of a minimal printing layer (5) on the entire surface of the base film (1) without patterning the metal vapor deposition layer (3) and slitting it as it is to prevent forgery of the present invention. The main purpose is to protect the metal vapor deposition layer (3) which is not covered with the extremely small print layer (5) when the slit thread is used. The intermediate coating resin layer (4) is not particularly limited and, for example, a coating material made of any of a thermoplastic resin, a thermosetting resin, an electron beam curable resin, an ultraviolet curable resin and the like can be used. For example, amino resin, amino alkyd resin, acrylic resin, styrene resin, acrylic-styrene copolymer, polyester resin, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral , Urethane resin, urea resin, melamine resin, urea-melamine resin, epoxy resin, fluorine resin, polycarbonate, nitrocellulose, cellulose acetate, alkyd resin, rosin-modified maleic acid resin, polyamide resin, etc. A resin coating consisting of these or a mixture thereof is used as the resin coating for the intermediate coating resin layer (4).

The intermediate coating resin layer (4) is coated with the resin coating for the intermediate coating resin layer (4) on the surface of the metal vapor deposition layer (3) by a conventional method such as a gravure coating method, a roll coating method or a spray coating method. It is formed by applying and drying (curing in the case of a curable resin) by a method. The thickness of the intermediate coating resin layer (4) is not particularly limited and is usually appropriately selected from the range of about 0.01 to 5 μm. If the thickness is less than 0.01 μm, it is difficult to uniformly coat the surface of the metal vapor deposition layer (3), and the adhesion and printing processability with respect to the minimal printing layer (5) formed thereon are improved. Such an effect cannot be expected and is not preferable. Further, the metal vapor deposition layer (3) cannot be sufficiently protected, which is not preferable. On the other hand, if the thickness exceeds 5 μm, there is no great difference in the effect of the intermediate coating resin layer (4), and the drying rate of the intermediate coating resin layer (4) becomes slow, which is inefficient, which is not preferable. Incidentally, a matting agent for the resin coating for the intermediate coating resin layer (4), for example, precipitated barium sulfate, barium carbonate, flour (CaCO ₃ ), gypsum, alumina white, clay, silica white, talc, calcium silicate,
If a pre-existing pigment such as precipitable magnesium carbonate or a metal powder such as aluminum powder, brass powder, or copper powder is mixed and dispersed in advance, specular reflection of the metal vapor deposition layer (3) can be suppressed, so that an attractive reflection effect can be obtained. You can

The minimum printing layer (5) used in the forgery prevention slit yarn of the present invention is the most characteristic of the forgery prevention slit yarn of the present invention, and is, for example, a trademark, a code, a symbol,
The patent number, issuer name, producer name, material name, product number, product standard number, lot number, bar code, etc. are printed in extremely small size. Its size is smaller than the width of the anti-counterfeiting slit thread, and even when it is used as the anti-counterfeiting slit thread, it can be read without missing a minute print. 0.5 mm-2
It is printed in the range of about mm.

The ink for printing the minimum printing layer (5) is not particularly limited, and commercially available printing ink can be used. When the metal vapor deposition layer (3) is patterned by using the opal processing method and the celite processing method, it is necessary to select and use those having excellent etching resistance, solvent resistance and water resistance, respectively. . Examples of vehicle materials for inks that can be used for such purposes include phenol resins, alkyd resins, polyamide resins, petroleum resins, ketone resins, aminoalkyd resins, acrylic resins, epoxy resins, vinyl resins, macron-indene resins, etc. Those mainly composed of synthetic resins and various modified products thereof, nitrocellulose, ethylcellulos, chlorinated rubber, cyclized rubber, and cellulose / rubber derivatives such as Gilsonite are used. Preferably, a printing ink having a thermosetting property, an electron beam curing property, an ultraviolet curing property or the like is used.

The minimal printing layer (5) is formed by applying the printing ink directly onto the surface of the base film (1) or directly onto the surface of the metal vapor deposition layer (3), or the intermediate coating resin layer (4). )
Through a standard printing method such as letterpress printing method, offset printing method, gravure printing method, trademark, code, symbol, patent number, issuer name, producer name, material name, product number, product standard Very small numbers, lot numbers, bar codes, etc. are printed.

The overcoat resin layer (6), which is appropriately adopted for the forgery prevention slit yarn, protects the metal vapor deposition layer (3) and the minimal printed layer (5) and improves the durability of the forgery prevention slit yarn. Doing is the main purpose. The topcoat resin layer (6) is not particularly limited, and for example, a coating material made of any of a thermoplastic resin, a thermosetting resin, an electron beam curable resin, an ultraviolet curable resin and the like can be used. For example, amino resin, amino alkyd resin, acrylic resin, styrene resin, acrylic-styrene copolymer, polyester resin, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral , Urethane resin, urea resin, melamine resin, urea-melamine resin, epoxy resin, fluorine resin, polycarbonate, nitrocellulose, cellulose acetate, alkyd resin, rosin-modified maleic acid resin, polyamide resin, etc. A resin paint composed of these or a mixture thereof is used as the resin paint for the overcoat resin layer (6).

The top coat resin layer (6) is formed by applying a resin coating for the top coat resin layer (6) onto the surface on which the metal vapor deposition layer (3) and the minimal printing layer (5) are formed by a gravure coating method or roll. It is formed by applying and drying (curing in the case of a curable resin) by a usual coating method such as a coating method and a spray coating method. Top coat resin layer (6)
The thickness is not particularly limited, and is usually appropriately selected from the range of about 0.5 to 5 μm. If the thickness is less than 0.5 μm, it is difficult to cover the entire surface, and the metal vapor deposition layer (3) and the minimal printing layer (5) thereunder cannot be sufficiently protected, which is not preferable. On the other hand, even if the thickness exceeds 5 μm, there is no great difference in the effect of the overcoat resin layer (6).
It is not preferable because the drying speed of (1) becomes slow and it is inefficient. Incidentally, a resin coating for the top coating resin layer (6), a matting agent,
For example, precipitated barium sulphate, barium carbonate, flour (CaCO
₃ ), gypsum, alumina white, clay, silica white, talc,
A metal vapor deposition layer (3) is obtained by preliminarily mixing and dispersing extender pigments such as calcium silicate and precipitated magnesium carbonate and metal powders such as aluminum powder, brass powder and copper powder.
Since the specular reflection of can be suppressed, an attractive reflection effect can be obtained.

The film-like material obtained as described above is cut into the forgery-preventing slit thread by cutting between the minute print layers (5) using a known micro slitter or tape slitter (FIG. 1). And FIG. 2). The width of the slit yarn is not particularly limited and is usually about 1 mm to 5 mm.

The thus obtained anti-counterfeit slit yarn of the present invention is a base film (1) having a metal vapor deposition layer (3) and a microprinting layer (5) formed on at least one surface in this order. By making a thread slit into a thin film, or a thread formed by forming a minimal print layer (5) and a metal deposition layer (3) on at least one side of the base film (1) in this order, , It became possible to identify it directly with the naked eye. The anti-counterfeiting slit thread of the present invention is a piece of paper used for gift certificates, banknotes, securities, passports, tickets, cards, important documents, etc. It is not forged because it is placed in paper such as Japanese paper, foreign paper, synthetic paper, or sandwiched between two sheets of paper, so it is not forged, and it is a copy made by copying with a color copying machine etc. Even if an attempt is made to forgery, since the portion of the metal vapor deposition layer (3) of the forgery prevention slit yarn of the present invention is copied in black, forgery can be completely prevented. Furthermore, since the slit thread for forgery prevention of the present invention can be woven or knitted in the same manner as other threads by an ordinary weaving machine, knitting machine, etc., for example, simply weaving it into the selvage of a woven fabric or the like puts the woven name. This makes it easy to distinguish from other people's products and is effective in eliminating counterfeit goods.

The present invention is described in detail below with reference to examples, but the invention is not limited thereto.

[0023]

【Example】

Example 1 Gold was vacuum-deposited on the entire front surface of a base film (1) made of a polyethylene terephthalate film having a thickness of 25 μm to form a metal vapor deposition layer (3) made of gold having a thickness of 80 nm, and a line width was further formed thereon. Is 1.5 mm and the print height is about 1
The mm mark and the company name were printed using a black printing ink to form an extremely small print layer (5) to obtain a film-like material. Then, this film-like material was slit with a micro slitter to a width of 1.5 mm between printed characters (see FIG. 1) to obtain a forgery preventing slit thread of the present invention.

Example 2 An epoxy resin coating material was applied on the entire front surface of a base film (1) made of a polyethylene terephthalate film having a thickness of 25 μm and dried to obtain an epoxy resin having a thickness of 0.5 μm (solid content thickness, hereinafter the same). Of the undercoating resin layer (2) is formed, and gold is vacuum-deposited on the entire surface of the undercoating resin layer (3) to form a metal deposition layer (3) of gold having a thickness of 80 nm. A logo mark having a printed character height of about 1 mm and a company name were printed using a black printing ink to form an extremely small printing layer (5) to obtain a film-like material. Then, this film-like material was slit with a micro slitter to a width of 1.5 mm between printed characters to obtain a forgery preventing slit thread of the present invention.

Example 3 Gold was vacuum-deposited on the entire front surface of a base film (1) made of a polyethylene terephthalate film having a thickness of 25 μm to form a metal vapor deposition layer (3) made of gold having a thickness of 80 nm, and on the entire surface thereof. A cellulosic resin coating is applied to and dried to form an intermediate coating resin layer (4) made of a cellulosic resin having a thickness of 1 μm, and a line width of 1.5 mm and a printed character height of about 1 mm are used as a logo mark. The company name was printed using a black printing ink to form a very small printing layer (5) to obtain a film-like material. Then, this film-like material was slit with a micro slitter to a width of 1.5 mm between printed characters to obtain a forgery preventing slit thread of the present invention.

Example 4 A base film (1) made of a polyethylene terephthalate film having a thickness of 25 μm was coated with an epoxy resin coating on the entire front surface and dried to form an undercoat resin layer (2) made of an epoxy resin having a thickness of 0.5 μm. And vacuum depositing gold on the entire surface to form a metal vapor deposition layer (3) made of gold having a thickness of 80 nm, coating a cellulose resin coating on the entire surface and drying to form a cellulose coating having a thickness of 1 μm. An intermediate coating resin layer (4) made of resin is formed, and a line width of 1.5 m is further formed on it.
A logo mark having a printed character height of about 1 mm and a company name were printed using a black printing ink to form an extremely small printing layer (5) to obtain a film-like material. Then, this film-like material was slit with a micro slitter to a width of 1.5 mm between printed characters to obtain a forgery preventing slit thread of the present invention.

Example 5 Gold was vacuum-deposited on the entire front surface of a base film (1) made of a polyethylene terephthalate film having a thickness of 25 μm to form a metal vapor-deposited layer (3) made of gold having a thickness of 80 nm, and formed thereon. The line width is 1.5 mm and the printed character height is about 1 mm.
The logo mark and the company name are printed with a black printing ink to form a very small printing layer (5), and then a melamine-alkyd resin coating is applied on the entire surface and dried to form a 3 μm thick melamine-alkyd resin coating. Top coat resin layer (6) made of resin
To obtain a film-like product. Then, this film-like material was slit with a micro slitter to a width of 1.5 mm between printed characters to obtain a forgery preventing slit thread of the present invention.

Example 6 An epoxy resin coating material was applied to the entire front surface of a base film (1) made of a polyethylene terephthalate film having a thickness of 25 μm and dried to form an undercoat resin layer (2) made of an epoxy resin having a thickness of 0.5 μm. Is formed, and gold is vacuum-deposited thereon to form a metal vapor deposition layer (3) made of gold having a thickness of 80 nm, on which a line width of 1.5 mm and a printed character height of about 1 are formed.
The logo mark of mm and the company name are printed with a black printing ink to form a very small printing layer (5), and then a melamine-alkyd resin coating is applied on the entire surface and dried to a thickness of 3 μm.
A top coat resin layer (6) consisting of m of melamine-alkyd resin was formed to obtain a film-like material. Then, this film-like material was slit with a micro slitter to a width of 1.5 mm between printed characters to obtain a forgery preventing slit thread of the present invention.

Example 7 Gold was vacuum-deposited on the entire front surface of a base film (1) made of a polyethylene terephthalate film having a thickness of 25 μm to form a metal vapor deposition layer (3) made of gold having a thickness of 80 nm on the surface. An intermediate coating resin layer (4) made of a cellulose resin having a thickness of 1 μm by coating and drying a cellulose resin coating on the
Is formed, and a logo with a line width of 1.5 mm and a printed character height of about 1 mm and a company name are printed using black printing ink to form a very small printing layer (5), and further on the entire surface. ,
Melamine-alkyd resin coating applied and dried to a thickness of 3
A top coat resin layer (6) made of a melamine-alkyd resin having a thickness of μm was formed to obtain a film-like material. Then, this film-like material was slit with a micro slitter to a width of 1.5 mm between printed characters to obtain a forgery preventing slit thread of the present invention.

Example 8 An epoxy resin coating material was applied to the entire front surface of a base film (1) made of a polyethylene terephthalate film having a thickness of 25 μm and dried to form an undercoat resin layer (2) made of an epoxy resin having a thickness of 0.5 μm. To form a metal vapor deposition layer (3) made of gold having a thickness of 80 nm on the surface, and applying a cellulosic resin coating on the surface and drying to form a cellulosic resin having a thickness of 1 μm. An intermediate coating resin layer (4) is formed, and a micro print layer (5) is formed by printing a logo mark with a line width of 1.5 mm and a printed character height of about 1 mm and a company name using black printing ink. A melamine-alkyd resin coating material was applied on the entire surface and dried to form an overcoat resin layer (6) made of a melamine-alkyd resin having a thickness of 3 μm to obtain a film. Then, this film-like material was slit with a micro slitter to a width of 1.5 mm between printed characters to obtain a forgery preventing slit thread of the present invention.

Example 9 A line width of 1.5 m was formed on the back side of a base film (1) made of a polyethylene terephthalate film having a thickness of 25 μm.
A logo mark with a character height of about 1 mm and a company name are printed with a black printing ink to form a very small printing layer (5).
Aluminum is vacuum-deposited on the entire surface to a thickness of 50 nm.
Of the aluminum, and a melamine-alkyd resin coating is applied on the entire surface of the metal vapor-deposited layer (3) and dried to form a topcoat resin layer (6) of 3 μm thick made of melamine-alkyd resin. A film-like material was obtained. Then, this film-like material was slit with a micro slitter to a width of 1.5 mm between printed characters to obtain a forgery preventing slit thread of the present invention.

Example 10 A line width of 1.5 m was formed on the back side of a base film (1) made of a polyethylene terephthalate film having a thickness of 25 μm.
A logo mark with a character height of about 1 mm and a company name are printed with a black printing ink to form a very small printing layer (5).
An aqueous polyvinyl alcohol solution was used to print on the surface of the layer other than the metal vapor deposition layer layer (3) of an arbitrary pattern to form a water-soluble resin printed layer having a thickness of 1 μm, and gold was vacuumed over the entire surface. By vapor deposition, a metal vapor deposition layer (3) made of gold having a thickness of 80 nm was formed to obtain a film having gold vapor deposited on the entire surface. The obtained gold-deposited film is showered with warm water to completely remove the water-soluble resin print layer and the metal vapor deposition layer (3) thereon, and the metal vapor deposition layer (3) having an arbitrary pattern is formed. A film having a film formed thereon was obtained. Further, a melamine-alkyd resin coating material was applied on the entire surface from above and dried to form an overcoat resin layer (6) made of a melamine-alkyd resin having a thickness of 3 μm to obtain a film. Then, this film-like material was slit with a micro slitter to a width of 1.5 mm between printed characters to obtain a forgery preventing slit thread of the present invention.

Example 11 Aluminum was vacuum-deposited on the entire front surface of a base film (1) made of a polyethylene terephthalate film having a thickness of 25 μm to form a metal vapor deposition layer (3) made of gold and having a thickness of 50 nm, and further thereon. A multi-color printing of a logo with a line width of 1.5 mm and a printed character height of about 1 mm with an orange printing ink and the company name with a black printing ink to form a very small printing layer (5), and then in a caustic soda solution The aluminum vapor deposition layer on the exposed portion was removed by etching, washed with water, and dried to obtain a film on which a metal vapor deposition layer (3) made of aluminum corresponding to the pattern of the minimal print layer (5) was formed. Then, this film-like material was slit with a micro slitter to a width of 1.5 mm between printed characters to obtain a forgery preventing slit thread of the present invention.

Application Example 1 The forgery-preventing slit yarn of the present invention obtained in Examples 1 to 11 was woven instead of a part of the warp yarn of the plain weave.
I was able to weave without problems, and the logo mark and the very small print of the company name clearly appeared on the ears of the fabric, and it fully fulfilled the role of the woven name. Further, when the forgery preventing slit yarn of the present invention is used, a complicated weaving work is not required, so that the woven name can be easily inserted.

Application Example 2 Further, while the pulp liquid is flowing into one end of the moving wire net of the Fourdrinier paper making machine, the first embodiment is adapted to the moving speed of the wire net from a position slightly behind the inflow position of the pulp liquid. Papermaking was carried out together with the pulp liquid while feeding the forgery prevention slit yarn of the present invention obtained in Nos. 11 to 11. Paper can be made without problems, the anti-counterfeit slit yarn of the present invention is located above the surface of the paper, and see the logo mark and the minimal printing of the company name through the thin pulp layer on the paper surface. I was able to do it. Since the anti-counterfeit slit thread is put in the paper, it can be printed and written like ordinary paper. Further, since the anti-counterfeit slit thread is contained in the paper, it is impossible for another person to forge the paper. Furthermore, if this paper is copied with a color copier, the metal vapor-deposited glossy part of the forgery prevention slit thread will be copied in black, so it can be identified at a glance that it is a copy, so gift certificates, banknotes, securities, passports, tickets. It is effective in preventing counterfeiting by using it for paper such as, cards and important documents.

[0036]

EFFECTS OF THE INVENTION By using the forgery preventing slit yarn of the present invention, it is possible to easily insert a woven name because complicated work such as name weaving is not required. In addition, it is impossible for another person to forge the paper for which the anti-counterfeiting slit thread of the present invention is put in, and since the surface is covered with the pulp layer, it is printed or written like ordinary paper. It is possible to see the extremely small print through the thin pulp layer on the surface. Moreover, when this paper is copied with a monochrome copier or a color copier, the metal vapor deposition gloss of the slit thread for forgery prevention is possible. Since the part is copied in black, it can be seen at a glance that it is a copy, so when used on paper such as gift certificates, banknotes, securities, passports, tickets, cards, important documents, etc. It exerts a remarkable effect in preventing such forgery.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a part of a film-shaped product before slitting in a process of manufacturing a forgery preventing slit yarn of the present invention.

FIG. 2 is a schematic plan view showing a part of the forgery prevention slit yarn of the present invention.

FIG. 3 is a schematic cross-sectional view showing an embodiment example of the forgery preventing slit yarn of the present invention.

FIG. 4 is a schematic cross-sectional view showing another embodiment example of the forgery prevention slit yarn of the present invention.

FIG. 5 is a schematic cross-sectional view showing another embodiment example of the forgery prevention slit yarn of the present invention.

[Explanation of symbols]

 1 Base Film 2 Undercoat Resin Layer 3 Metal Vapor Deposition Layer 4 Intermediate Coat Resin Layer 5 Micro Printing Layer 6 Topcoat Resin Layer

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Masanari Seguchi 125, Takeda Mukoyo-cho, Fushimi-ku, Kyoto, Kyoto Prefecture Oike Development Laboratory Co., Ltd.

Claims (8)

[Claims] 1. A forgery-preventing slit yarn obtained by narrowly slitting a base film (1) having a metal vapor deposition layer (3) and a very small printing layer (5) formed on at least one side thereof, in which the forming order is set. , A base film (1) / a metal vapor deposition layer (3) / a micro print layer (5) in the order: forgery prevention slit yarn. 2. The forgery prevention slit yarn according to claim 1, wherein an undercoat resin coating film layer (2) is formed between the base film (1) and the metal vapor deposition layer (3). 3. The intermediate resin coating film layer (4) is formed between the metal vapor deposition layer (3) and the minimum printed layer (5).
Or the slit thread for preventing forgery according to 2. 4. The anti-counterfeit slit yarn according to claim 1, 2 or 3, wherein an overcoat resin coating layer (6) is formed on the minimum printed layer (5). 5. A forgery-preventing slit yarn in which a metal vapor deposition layer (3) and a microprinting layer (5) formed on at least one side of a base film (1) are slit into a narrow width, and the formation order is as follows. , A base film (1) / a micro print layer (5) / a metal vapor deposition layer (3) in this order, which is a forgery preventing slit yarn. 6. The forgery preventing slit yarn according to claim 5, wherein the top coat resin coating film layer (6) is formed on the metal vapor deposition layer (3). 7. The forgery preventing slit yarn according to claim 1, wherein the metal vapor deposition layer (3) is formed in an arbitrary pattern. 8. The forgery-preventing slit yarn according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the extremely small printing layer (5) is formed by multicolor printing.